Rotary drier.



lNvENTOR Patented Sept. 23, |902.

L GRILL ROTARY DRIEH.

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WITNEssEs m 'lliurrnn dilemas Paritair Ottica,

LEVI GRILL, OF CLEVELAND, OI'IIO.

ROTARY DRIER.

SPECIFICATION forming part of Letters Patent No. 709,704, datedSeptember 23, 1902.

Application tiled January 13, 1902. Serial No. 89,604. (No model-l To1r/ZZ 1.1;71/0111/ it may concern:

Beit known that I, LEVI GRILL, a citizen of the United States ofAmerica, and a resident of Cleveland, in the county of Cuyahoga andState of Ohio, have invented certain new anduseful Improvements inRotary Driers, of which the following is a specilication.

My invention relates to poweroperated driers; and the objects of myimprovement are, first, to obtain the largest possible heating or dryingsurface in a given amount ot' space, and, second, to reduce the cost ofconstruction and maintenance of such driers. I attain these objects in adrier constructed su bstantially as shown in the accompanying drawings,in which Figure 1 represents a longitudinal sectional View of saiddrier. Fig. 2 is a part end view and part transverse sectional view ofsaid drier. Fig. 3 is an enlarged end view of one of the heads, .showingthe tubes therein. Fig. 4 is a vertical section of one of the heads, andFig. 5 is a similar View of one ofthe tubes.

Like letters of reference denote like parts in the drawings andspecification.

Substantially the apparatus consists ot the furnace A, a plurality offlues B B 3', a brick inclosure C for said tubes, means for rotatingsaid iiues, a hopper D, and a fan E.

The principal feature oi my invention consists in the construction,arrangement, and equipment of the lines, the manner in which thematerial is Afed to said flues, and the manner in which the hot gasesare directed around and in said fines.

As shown, the centerflue or tube B extends from the front to the rearbrick wall and terminates in trunnions d a', Which are journaled inbearings l) b', same having pivotal connection with the stands c c', therelative connection of trunnions, bearings, and stands being such as toadmit of free rotation of the tube or flue regardless of the effects ofheat upon said tube or flue. Part way in from the terminals of said tubeare secured the heads F F'. (See Fig. l and detached views Figs. 3 and4.) Symmetrically arranged upon said heads around the central sleeve dare a plurality of sleeves d for reception of the ou ter lines or tubesB' B' B'. All the tubes have riveted connection with themselves and theheads by means ot said sleeves, thereby establish ing a solid, durable,yet comparatively light structure, considering `the capacity of suchdriers. The center ring or plate G is another element adding stabilityto this structure. Furthermore, a cone-shaped hood His secured to theouter face of head F. Thus the hood is turned with-and by said head.Part way into the mouth of said hood is snugly fitting the stationaryhopper-casing D. (See Fig. l.) Inside each tube I provide a series ofcarriers I, which extend above the entire length of the tubes. (SeeFigs. 3 and Angle-iron I prefer for said carriers. A seriesof rings eform the means of connecting said angleirons. Said rings pass throughstirrups f near the terminals ot said flues, thus causing theangle-irons (carriers) to move in unison with said iiues, as well aspreventinglongitudinal displacement of said angle-irons. By means ofsaid carriers I the material to be dried `is stirred up, lifted, anddropped 'for the purpose of effecting a thorough and uniform treatmentthereof, thereby enhancing the etliciency of such driers.

As above st-ated,the material is fed through the hopper D, the bulk ofWhich descends to the lowest situated part of head II to be distributedamong the outer fines, while a portion of the material enters thecentral tube by way of one or more slot-s g. (See Fig. l.) The hot gasesfrom the fireplace A pass around the exterior of all the ilues andtravel through the interior ot' the flues before same can be drawn offthrough fan F.. Therefore the material not only becomes uniformly dried,but the heat energy is also utilized to the best advantage. From therear terminal of the ilues the dried material is discharged into thechannel G ready for being packed. and shipped.

In driers of smaller capacity the central flue may be omitted withoutdeparting from the nature of my invention. tral tube is used, then thetrunniolus may be formed integral with the heads F F, in which instancethe cost of construction is materially lessened.

When no cen- What I claim, and desire to secure by Let- IOO charges asshown, and for the purpose described.

2. In a power-operated drier, comprisinga central tube and aplurality ofauxiliary tubes, all being connected as shown, the center tubeterminating in trunnions and having side openings for the passage ofmaterial therethrough.

3. In adrier, in combination, a central drying-tube rotatively mounted,and a plurality of eXteriordrying-tubes positioned relative to androtatable with said lcentral tube and forming a unitary structuretherewith.

4. In a power-operated drier, in combination, a furnace, and a series ofrotatable lues for the passage ot' gases from said furnace, said luesbeing combined to form a unitary structure and forming independentdryingchambers, one of said fines forming the support for the remainingfines.

5. In a drier, in combination, a plurality of 6. In adr-ier, incombination, a plurality of rotating drying-tubes connected by rotatingheads, one of said tubes forming the support for said heads, a hopper,and means for feeding the material from the hopper to said tubes.

7. In a drier, a furnace, a fan, and a plurality of 'lues mounted inrotating heads to form a unitary structure, one of said fines formingthe support for said heads, said dues forming the sole passage-Wayleading to said fan, whereby the gases will be drawn through each tubein the same direction.

Signed at Cleveland, Ohio, this 24th day of December, 1901.

LEVI GRILL. XVitnesses:

BERNH. F. EIBLER, CLARENCE A. GIBBS.

